Kirk, I have an onboard Onan 4000.
JimK, I empathize with your confusion. The terms are loosey-goosey. In looking at reviews of them I see them most often referred to as "solar generators" but also as "portable power stations." I think the latter is more accurate, but the fact that they can be charged by solar is new, I take it, so thus the new term.
I hope no one is confusing "throttling" where your speed is drastically reduced for the balance of the pay period with "deprioritizing" where your speed is somewhat reduced temporarily on congested towers only for the period of the congestion. Our Visible and AT&T data services are both deprioritized, but if/when it happens, it hasn't interfered with streaming to any noticeable degree. The slowdowns are typically more like what we've always seen on busy towers even when not deprioritized and usually clears up after prime hours.